"use client"

import * as React from "react"
import * as RechartsPrimitive from "recharts"

import { cn } from "@/lib/utils"

// Format: { THEME_NAME: CSS_SELECTOR }
const THEMES = { light: "", dark: ".dark" } as const

export type ChartConfig = {
	[k in string]: {
		label?: React.ReactNode
		icon?: React.ComponentType
	} & ({ color?: string; theme?: never } | { color?: never; theme: Record<keyof typeof THEMES, string> })
}

type ChartContextProps = {
	config: ChartConfig
}

const ChartContext = React.createContext<ChartContextProps | null>(null)

function useChart() {
	const context = React.useContext(ChartContext)

	if (!context) {
		throw new Error("useChart must be used within a <ChartContainer />")
	}

	return context
}

const ChartContainer = React.forwardRef<
	HTMLDivElement,
	React.ComponentProps<"div"> & {
		config: ChartConfig
		children: React.ComponentProps<typeof RechartsPrimitive.ResponsiveContainer>["children"]
	}
>(({ id, className, children, config, ...props }, ref) => {
	const uniqueId = React.useId()
	const chartId = `chart-${id || uniqueId.replace(/:/g, "")}`

	return (
		<ChartContext.Provider value={{ config }}>
			<div
				data-chart={chartId}
				ref={ref}
				className={cn(
					"flex aspect-video justify-center text-xs [&_.recharts-cartesian-axis-tick_text]:fill-muted-foreground [&_.recharts-cartesian-grid_line[stroke='#ccc']]:stroke-border/50 [&_.recharts-curve.recharts-tooltip-cursor]:stroke-border [&_.recharts-dot[stroke='#fff']]:stroke-transparent [&_.recharts-layer]:outline-none [&_.recharts-polar-grid_[stroke='#ccc']]:stroke-border [&_.recharts-radial-bar-background-sector]:fill-muted [&_.recharts-rectangle.recharts-tooltip-cursor]:fill-muted [&_.recharts-reference-line_[stroke='#ccc']]:stroke-border [&_.recharts-sector[stroke='#fff']]:stroke-transparent [&_.recharts-sector]:outline-none [&_.recharts-surface]:outline-none",
					className,
				)}
				{...props}>
				<ChartStyle id={chartId} config={config} />
				<RechartsPrimitive.ResponsiveContainer>{children}</RechartsPrimitive.ResponsiveContainer>
			</div>
		</ChartContext.Provider>
	)
})
ChartContainer.displayName = "Chart"

const ChartStyle = ({ id, config }: { id: string; config: ChartConfig }) => {
	const colorConfig = Object.entries(config).filter(([, config]) => config.theme || config.color)

	if (!colorConfig.length) {
		return null
	}

	return (
		<style
			dangerouslySetInnerHTML={{
				__html: Object.entries(THEMES)
					.map(
						([theme, prefix]) => `
${prefix} [data-chart=${id}] {
${colorConfig
	.map(([key, itemConfig]) => {
		const color = itemConfig.theme?.[theme as keyof typeof itemConfig.theme] || itemConfig.color
		return color ? `  --color-${key}: ${color};` : null
	})
	.join("\n")}
}
`,
					)
					.join("\n"),
			}}
		/>
	)
}

const ChartTooltip = RechartsPrimitive.Tooltip

const ChartTooltipContent = React.forwardRef<
	HTMLDivElement,
	React.ComponentProps<typeof RechartsPrimitive.Tooltip> &
		React.ComponentProps<"div"> & {
			hideLabel?: boolean
			hideIndicator?: boolean
			indicator?: "line" | "dot" | "dashed"
			nameKey?: string
			labelKey?: string
		}
>(
	(
		{
			active,
			payload,
			className,
			indicator = "dot",
			hideLabel = false,
			hideIndicator = false,
			label,
			labelFormatter,
			labelClassName,
			formatter,
			color,
			nameKey,
			labelKey,
		},
		ref,
	) => {
		const { config } = useChart()

		const tooltipLabel = React.useMemo(() => {
			if (hideLabel || !payload?.length) {
				return null
			}

			const [item] = payload
			const key = `${labelKey || item?.dataKey || item?.name || "value"}`
			const itemConfig = getPayloadConfigFromPayload(config, item, key)
			const value =
				!labelKey && typeof label === "string"
					? config[label as keyof typeof config]?.label || label
					: itemConfig?.label

			if (labelFormatter) {
				return <div className={cn("font-medium", labelClassName)}>{labelFormatter(value, payload)}</div>
			}

			if (!value) {
				return null
			}

			return <div className={cn("font-medium", labelClassName)}>{value}</div>
		}, [label, labelFormatter, payload, hideLabel, labelClassName, config, labelKey])

		if (!active || !payload?.length) {
			return null
		}

		const nestLabel = payload.length === 1 && indicator !== "dot"

		return (
			<div
				ref={ref}
				className={cn(
					"grid min-w-[8rem] items-start gap-1.5 rounded-lg border border-border/50 bg-background px-2.5 py-1.5 text-xs shadow-xl",
					className,
				)}>
				{!nestLabel ? tooltipLabel : null}
				<div className="grid gap-1.5">
					{payload.map((item, index) => {
						const key = `${nameKey || item.name || item.dataKey || "value"}`
						const itemConfig = getPayloadConfigFromPayload(config, item, key)
						const indicatorColor = color || item.payload.fill || item.color

						return (
							<div
								key={item.dataKey}
								className={cn(
									"flex w-full flex-wrap items-stretch gap-2 [&>svg]:h-2.5 [&>svg]:w-2.5 [&>svg]:text-muted-foreground",
									indicator === "dot" && "items-center",
								)}>
								{formatter && item?.value !== undefined && item.name ? (
									formatter(item.value, item.name, item, index, item.payload)
								) : (
									<>
										{itemConfig?.icon ? (
											<itemConfig.icon />
										) : (
											!hideIndicator && (
												<div
													className={cn(
														"shrink-0 rounded-[2px] border-[--color-border] bg-[--color-bg]",
														{
															"h-2.5 w-2.5": indicator === "dot",
															"w-1": indicator === "line",
															"w-0 border-[1.5px] border-dashed bg-transparent":
																indicator === "dashed",
															"my-0.5": nestLabel && indicator === "dashed",
														},
													)}
													style={
														{
															"--color-bg": indicatorColor,
															"--color-border": indicatorColor,
														} as React.CSSProperties
													}
												/>
											)
										)}
										<div
											className={cn(
												"flex flex-1 justify-between leading-none",
												nestLabel ? "items-end" : "items-center",
											)}>
											<div className="grid gap-1.5">
												{nestLabel ? tooltipLabel : null}
												<span className="text-muted-foreground">
													{itemConfig?.label || item.name}
												</span>
											</div>
											{item.value && (
												<span className="font-mono font-medium tabular-nums text-foreground">
													{item.value.toLocaleString()}
												</span>
											)}
										</div>
									</>
								)}
							</div>
						)
					})}
				</div>
			</div>
		)
	},
)
ChartTooltipContent.displayName = "ChartTooltip"

const ChartLegend = RechartsPrimitive.Legend

const ChartLegendContent = React.forwardRef<
	HTMLDivElement,
	React.ComponentProps<"div"> &
		Pick<RechartsPrimitive.LegendProps, "payload" | "verticalAlign"> & {
			hideIcon?: boolean
			nameKey?: string
		}
>(({ className, hideIcon = false, payload, verticalAlign = "bottom", nameKey }, ref) => {
	const { config } = useChart()

	if (!payload?.length) {
		return null
	}

	return (
		<div
			ref={ref}
			className={cn(
				"flex items-center justify-center gap-4",
				verticalAlign === "top" ? "pb-3" : "pt-3",
				className,
			)}>
			{payload.map((item) => {
				const key = `${nameKey || item.dataKey || "value"}`
				const itemConfig = getPayloadConfigFromPayload(config, item, key)

				return (
					<div
						key={item.value}
						className={cn(
							"flex items-center gap-1.5 [&>svg]:h-3 [&>svg]:w-3 [&>svg]:text-muted-foreground",
						)}>
						{itemConfig?.icon && !hideIcon ? (
							<itemConfig.icon />
						) : (
							<div
								className="h-2 w-2 shrink-0 rounded-[2px]"
								style={{
									backgroundColor: item.color,
								}}
							/>
						)}
						{itemConfig?.label}
					</div>
				)
			})}
		</div>
	)
})
ChartLegendContent.displayName = "ChartLegend"

// Helper to extract item config from a payload.
function getPayloadConfigFromPayload(config: ChartConfig, payload: unknown, key: string) {
	if (typeof payload !== "object" || payload === null) {
		return undefined
	}

	const payloadPayload =
		"payload" in payload && typeof payload.payload === "object" && payload.payload !== null
			? payload.payload
			: undefined

	let configLabelKey: string = key

	if (key in payload && typeof payload[key as keyof typeof payload] === "string") {
		configLabelKey = payload[key as keyof typeof payload] as string
	} else if (
		payloadPayload &&
		key in payloadPayload &&
		typeof payloadPayload[key as keyof typeof payloadPayload] === "string"
	) {
		configLabelKey = payloadPayload[key as keyof typeof payloadPayload] as string
	}

	return configLabelKey in config ? config[configLabelKey] : config[key as keyof typeof config]
}

export { ChartContainer, ChartTooltip, ChartTooltipContent, ChartLegend, ChartLegendContent, ChartStyle }
